Cool Beans

-New spinner (close #110)
--Although documentation and some API things are still needed
-Build system tentatively using promises (close #15)
-Some CloudConvert and File class fixes
-Footnote fixes
-Close #153 and close #149
-Slightly improved file browser (close #152)
Overall, a good day for fixes
I touched on #154, and kept working on that project. As that goes along
pretty well, the API has been improving for real world usage.
Documenting all of this will be a huge feat though.